The Effect of Load and Sliding Speed on Friction and Abrasion Performances of Pure and Glass Fiber Added PEEK Polymer

Abstract

Plastic-based bushings and bearings are used in some parts of the machines used in different sectors of the industry. In applications where high temperature, corrosion, chemical resistance and wear resistance are required, choosing a right material is very important for the service life of the machine element. In this study, the tribological performances of pure poly-ether-ether-ketone (PEEK) polymer and 30% by weight glass fiber (GF) reinforced poly-ether-ether-ketone (PEEK-30GF) composite were investigated. The materials used in the experiments are in the form of rods produced for industrial purposes by the extrusion method. Tribological experiments were carried out 2000 m under dry sliding conditions at room temperature using a pin-on-disc wear test device. Two different loads (30 N and 60 N) and four different speeds (1, 2, 3 and 4 m s-1) were used in the experiments. As a result of the experiments, the friction coefficient, pin temperature and specific wear rate of pure PEEK polymer and 30% glass fiber reinforced PEEK composite were determined. As a result of the experiments, with the increase of the sliding speed, the wear rate of both pure PEEK and glass fiber reinforced PEEK composite increased, while the friction coefficient values decreased. At low load (30 N) and speed (1 m s-1), PEEK composite was found to be 2.46 times more wear resistant than pure PEEK polymer. In addition, microstructure examinations of the wear surface of the test materials were carried out using an optical microscope. Adhesive wear at low loads and speeds and abrasive wear mechanisms at high speeds and loads were observed for both test materials.

Keywords

• PEEK
• glass fiber
• tribology
• wear rate
• friction coefficient
• composite

Saf ve Cam Elyaf Katkılı PEEK Polimerin Sürtünme ve Aşınma Performanslarına Yük ve Kayma Hızının Etkisi

Abstract

Endüstrinin değişik sektörlerinde kullanılan makinaların bazı aksamlarında plastik esaslı burç ve yataklar kullanılmaktadır. Yüksek sıcaklık, korozyon, kimyasal direnç ve aşınma direnci istenen uygulamalarda doğru malzeme seçimi, makina elemanının çalışma ömrü açısından oldukça önemlidir. Bu çalışmada, saf poli-eter-eter-keton (PEEK) polimeri ile ağırlık olarak %30 oranında cam elyaf (CE) takviyeli poli-eter-eter-keton (PEEK-30CE) kompozitin tribolojik performansları araştırılmıştır. Deneylerde kullanılan malzemeler, ekstrüzyon yöntemiyle endüstriyel amacıyla üretilmiş çubuk formunda malzemelerdir. Tribolojik deneyler disk üzerinde pim cihazı kullanılarak oda sıcaklığında 2000 m kuru kayma şartlarında gerçekleştirilmiştir. Deneylerde iki farklı yük (30 N ve 60 N) ve dört farklı hız (1, 2, 3 ve 4 m s-1) kullanılmıştır. Deneyler sonucunda saf PEEK polimer ve %30 oranında cam elyaf takviyeli PEEK kompozitinin sürtünme katsayısı, pim sıcaklığı ve spesifik aşınma oranı belirlenmiştir. Deneyler sonucunda kayma hızının artması ile hem saf PEEK hem de cam elyaf takviyeli PEEK kompozitin aşınma oranı artarken sürtünme katsayısı değerleri ise azalmıştır. Düşük yük (30 N) ve hızda (1 m s-1) PEEK kompoziti saf PEEK polimerine göre 2.46 kez daha aşınma dirençli olduğu tespit edilmiştir. Ayrıca optik mikroskop kullanılarak deney malzemelerinin aşınma yüzeyi mikroyapı incelemeleri gerçekleştirilmiştir. Her iki deney malzemesi için düşük yük ve hızlarda adhezif aşınma, yüksek hız ve yüklerde ise abrazif aşınma mekanizması gözlenmiştir.

Keywords

• PEEK
• cam elyaf
• triboloji
• aşınma oranı
• sürtünme katsayısı
• kompozit

References

1. Ashby MF, Jones DRH, 1998. Engineering materials 2, Butterworth Heinemann, Oxford.
2. Davim PJ, Cardoso R, 2009. Effect of the reinforcement (carbon or glass fibres) on friction, and wear behaviour of the PEEK against steel surface at long dry sliding. Wear, 266, 795–799.
3. Demir ME, Çelik YH, Kılıçkap E, 2019. Cam ve karbon elyaf takviyeli kompozitlerde elyaf cinsinin, yükün, kayma hızı ve mesafesinin abrazif aşınmaya etkisi. Politeknik Dergisi, 22(4): 811-817.
4. Doumeng M, Ferry F, Delbé K, Mérian, T, Chabert, F, Berthet F, Marsan, O, Nassiet V, Denape J, 2019. Evolution of crystallinity of PEEK and glass-fibre reinforced PEEK under tribological conditions using Raman spectroscopy. Wear, 426–4271040–1046. Friedrich K, 2018. Polymer composites for tribological applications, advanced industrial and engineering. Polymer Research. 1, 3-39.
5. Gandhi R, Jayawant A, Bhalerao A, Dandagwhal R, 2018. Applicability of composite polymer gear in low RPM applications – a review. Int. J. Eng Sci Invent,7:36–41.
6. Greene E, 1999. Marine Composites Second edition, Annapolis, ISBN 0-9673692-0-7 ABD.
7. https://turkish.alibaba.com/product-detail/PEEK-plastic-shaft-sleeve-PEEK-CA30-556044962.
8. html https://tr.best rubber plastic.com/cnc-machining-service/peek-machining-service/peekbushing.html.

9. Hamilton S, Muñoz-Escalona P, 2019. Enhancement of wear properties of a polyetheretherketone polymer by incorporation of carbon and glass fibers. J. Appl. Polym. Sci. 47587 1-11.
10. Hanchi J, Eiss NS, 1997. Dry sliding friction and wear of shortcarbon-fiber-reinforced polyetheretherketone (PEEK) at elevated temperatures. Wear, 203-204 380-386.
11. Harsha A.P, Wasche R, 2018. Influence of temperature on friction and wear characteristics of polyetherketones and their composites under reciprocating sliding condition. Journal of Materials Engineering and Performance, 27(10) 5438.
12. Hausberger A, Stiller T, Kappl C, Hensgen, L, Grün F, 2021. Improving the tribological properties of technical polymers with metal sulphide compounds. Lubricants, 9, 91.
13. Hearle J.W, 2001, High-performance fibres, CRC Press, Cambridge.
14. Hu J, 2008. 3-d fibrousas semblies: Properties, applications and modelling of three-dimensional textile structures. Woodhead Publishing Limited.
15. Jacobs O, Jaskulka R, Yan C, Wu, W. 2005. On the effect of counter-face material and aqueous environment on the sliding wear of various PEEK compounds. Tribology Letters, 18, 3.
16. Jin Z, Yao Zhenqiang, Sun Y, Shen H, 2022. Loading capacity of PEEK blends in terms of wear rate and temperature. Wear, 496-497 204306.
17. Kalaycı E, Avinç O, Yavaş A, 2017. Poli-eter-eter-keton (Peek) Lifleri, Cumhuriyet Üniversitesi, Fen Fakültesi, Fen Bilimleri Dergisi. Cilt 38, No. 2 ISSN: 1300-1949.
18. Li E.Z, Xu BS, Wang HD, Guo WL, 2013. The tribological behavior of glass fiber-reinforced polyetheretherketone composite under dry sliding and water lubrication. Journal of Reinforced Plasticsand Composites. 32(5) 318–329.
19. Li EZ, Guo WL, Wang HD, Xu BS, Liu XT, 2013. Research on Tribological Behavior of PEEK and glass fiber reinforced PEEK composite. Physics Procedia, 50 453–460.
20. May R, 1988. Poly-ether-ether-ketones, in: HF. Mark NM, Bikales CG, Overberger G, Menges JI, Kroschiwitz (Eds.). Encyclopedia of Polymer Science and Engineering, John Wiley and Sons, New York, pp.313-320.
21. Myshkin NK, Pesetskii SS, Grigoriev AY, 2015. Polymer Tribology: Current State and Applications. Tribology in Industry, 37(3) 284-290.
22. Özer H. 2015. Sürekli cam elyaf takviyeli termoplastik kompozit malzemelerin geliştirilmesi ve mekanik özelliklerinin deneysel olarak belirlenmesi. Yüksek lisans tezi, Uludağ Üniversitesi Fen Bilimleri Enstitüsü, Bursa.
23. Padhan M, Marathe U, Bijwe J, 2020. Tribology of Poly(etherketone) composites based on nano-particles of solid lubricants. Composites Part B, 201 108323.
24. Pihtili H, Tosun N, 2002. Effect of load and speed on the wear behavior of woven glass fabrics and aramid fibre reinforced composites. Wear, 252 11–12: 979–984.
25. Şafak D, 2001. Plastik enjeksiyon kalıplarının tasarım bakımından incelenmesi ve uygulamalı tasarım örneği. Yüksek Lisans Tezi. İstanbul Teknik Üniversitesi, Fen Bilimleri Enstitüsü, İstanbul.
26. Schmidlin PR, Stawarczyk B, Wieland M, Attin T, Ha¨mmerle CH, Fischer J, 2010. Effect of different surface pre-treatments and luting materials on shear bond strength to PEEK. Dental Material, 26(6):553-559. Sharma S, ve Gupta K, 2012. Mechanical and abrasive wear characterization of bidirectional and chopped E-glass fiber reinforced composite materials. Materials and Design, 35, 467–479.
27. Song J, Lioa Z, Shi H, Xiang D, Liu Y, Liu W, Peng Z, 2017. Fretting wear study of peek based composites for bio implant application. Tribology Letters, 65:150.
28. Sümer M, Ünal H, Mimaroglu A, 2008. Evaluation of tribological behavior of PEEK and glass fibre reinforced PEEK composite under dry sliding and water lubricated conditions. Wear, 265 1061–1065.
29. Tatsumi G, Ratoi M, Shitara Y, Hasegawa S, Sakamoto K, Mellor B.G, 2021. Mechanism of oil-lubrication of PEEK and its composites with steel counterparts. Wear, 486-487 204085. Teng X, Wen L, Lv Y, Tang W, Zhao X, Chen C, 2018. Effects of potassium titanate whisker and glass fiber on tribological and mechanical properties of PTFE/PEEK blend. High Performance Polymers, 30(6) 752–764.
30. Ünal H, Ermiş K, 2021. Polietereterketon ve kompozitlerinin polyester matrisli termoset kompozit malzemesine karşı aşınma ve sürtünme performanslarının incelenmesi. Iğdır Üniversitesi Fen Bilimleri Enstitüsü Dergisi, 11(1): 450-463.
31. Xie G.Y, Sui G.X, Yang R, 2011. Effects of potassium titanate whiskers and carbon fibers on the wear behavior of polyetheretherketone composite under water lubricated condition. Composites Science and Technology, 71 828–835.
32. Yamamoto Y, Hashimoto M, 2004. Friction and wear of water lubricated PEEK and PPS sliding contacts Part 2. composites with carbon or glass fibre. Wear, 257 181–189.
33. Yılmaz T, 2002. PEEK (polietereterketon) ve kompozitlerinde kısa fiber takviyesi ve mikroyapının tribolojik özelliklere etkisi. Yüksek Lisans Tezi, Kocaeli Üniversitesi, Fen Bilimleri Enstitüsü, Kocaeli.